397740530 has 32 divisors (see below), whose sum is σ = 781861248. Its totient is φ = 144476800.

The previous prime is 397740529. The next prime is 397740533. The reversal of 397740530 is 35047793.

It is not an unprimeable number, because it can be changed into a prime (397740533) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 165014 + ... + 167406.

It is an arithmetic number, because the mean of its divisors is an integer number (24433164).

Almost surely, 2^397740530 is an apocalyptic number.

397740530 is a deficient number, since it is larger than the sum of its proper divisors (384120718).

397740530 is a wasteful number, since it uses less digits than its factorization.

397740530 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3922.

The product of its (nonzero) digits is 79380, while the sum is 38.

The square root of 397740530 is about 19943.4332550842. The cubic root of 397740530 is about 735.4163528725.

The spelling of 397740530 in words is "three hundred ninety-seven million, seven hundred forty thousand, five hundred thirty".